Electroreductive synthesis of some functionalized polysilanes and related polymers

Kashimura, Shigenori; Ishifune, Manabu; Bu, Hang-Bom; Takebayashi, Masakatsu; Kitajima, Satsuki; Yoshihara, Daisuke; Nishida, Ryoichi; Kawasaki, Shinichi; Murase, Hiroki; Shono, Tatsuya

doi:10.1016/s0040-4039(97)00987-8

Cited by 34 publications

(15 citation statements)

References 25 publications

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“…Polystannanes have attracted the attention of many researchers, [1][2][3][4] because heavier atoms in the backbone of s-conjugated polymers are expected to give larger s-conjugation, narrower band gaps, and more metallic character. [5][6][7][8][9][10] The most frequently employed synthetic pathways to polysilanes and polygermanes, which have been more extensively studied as s-conjugated polymers, are Wurtz coupling with alkali metals, 11 electrochemical reduction, [12][13][14][15] and dehydrogenative coupling. 16 Among these, electrochemical reduction has been said to be the most important pathway as an industrial method.…”

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confidence: 99%

Electrochemical synthesis of dialkylsubstituted polystannanes and their properties

Okano¹,

Matsumoto²,

Arakawa³

et al. 1998

Chem. Commun.

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confidence: 99%

Electrochemical synthesis of dialkylsubstituted polystannanes and their properties

Okano¹,

Matsumoto²,

Arakawa³

et al. 1998

Chem. Commun.

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“…These organosilicon compounds also have functional organic side groups, and as a result they possess both organic and inorganic properties [6][7][8][9][10][11] . The organic properties of PSi materials are what make them compatible with polyolefin, while the Si-Si backbone grants these polymers photo-and electronic-properties similar to those of semi-conductive silicones, such as photoconductivity 12,13) , photo-reactive properties [14][15][16] , high heat-resistance 17,18) , and non-linear optical properties [19][20][21] . The mechanisms by which the interfacial PSi coating improves the heat-fusion properties of PE films and the nature of the interaction between polyolefin and PSi at the heat-fusion boundary remain unclear, however.…”

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confidence: 99%

The Effect of Interfacial Polysilane Coating on Heat Fusion Properties of Polypropylene

Tokumitsu

Hayashi

Fukunishi

et al. 2018

J. Soc. Rheol., Jpn

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We investigate the effect of an interfacial phenyl-methyl polysilane (PMPS) coating on the heat-fusion properties of polypropylene (PP). Application of PMPS to the heat-fusion interface of PP films increases the peeling strength such that modified films cannot be peeled off, unlike PP films without PMPS under identical conditions. Therefore, modified films can be heat-fused at a much lower temperature than neat samples. Upon addition of silicone oil of nearly the same molecular weight as PMPS to the surface of PP films, the peeling strength decreases dramatically Field emission transmission electron microscopy results show a discontinuous heat-fusion boundary in the neat PP sample, even when the sample is completely heat-fused. However, when PMPS is applied to PP film surfaces, the boundary at the heat-fusion interface is barely observable; instead, continuous lamella crystals are observed at the interface. Viscoelastic measurements of PP films with added PMPS record an activation energy of 30.9 kJ mol −1 for the molecular motion of PP in the heat-flow region, which is lower than that of neat PP (34.9 kJ mol −1). This result indicates that PMPS enhances the molecular motion of PP in the molten state.

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“…PSi materials are remarkable polymers with a backbone comprised of Si–Si bonds and side chains formed from organic functional groups, and as a result they possess properties of both organic and inorganic materials 5–10. The organic properties of PSis are what make them compatible with PE, while due to the Si–Si backbone, these polymers have photo‐ and electronic‐properties similar to those of semiconductive silicones, such as photo‐conductivity,11, 12 photo‐reactive properties,13–15 high heat‐resistance,16, 17 and nonlinear optical properties 18–20. The mechanisms by which addition of Psi materials to the surface of PE films improves their heat‐fusion properties and the nature of the interaction between PE and PSi at the heat‐fusion boundary remain unclear, however.…”

Section: Introductionmentioning

confidence: 99%

The effect of adding polysilane on heat fusion properties of various kinds of polyethylene

Tokumitsu

Yamada

Nakamura

et al. 2012

J of Applied Polymer Sci

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In this study, the affects that added polysilanes (PSis) (linear (M w ¼ 500-24,900, PMPS), cyclic (M w ¼ 900, PDPS), and networked (M w ¼ 1100, PPSi)) have on the heat-fusion properties of various types of polyethylene (PE) materials (HDPE, LDPE, LLDPE, and UHMWPE) were investigated. Addition of PM-5 (PMPS; M w ¼ 500) on the surface of PE films led to an increase in the peeling strength such that the modified films could not be peeled off even under the same conditions for which the PE films without PM-5. This result indicated that the modified film could be heat-fused at a much lower temperature than the neat sample. On addition of PDPS or PPSi of nearly the same molecular weight as PM-5 to the surface of PE films, the peeling strength decreased dramatically and the modified films could not be heat-fused any further than the neat PE samples under the same conditions. Moreover, for PMPSs of higher molecular weights, the peeling strength decreased dramatically with increasing molecular weight, and the modified PE films could not be heat-fused and thus were readily peeled off. Through evaluation of electron probe microanalysis measurements, it was found that only PM-5 (M w ¼ 500) can diffuse (migrate) into PE materials. Furthermore, the diffusion distance increased in the order LDPE, LLDPE, UHMWPE, and HDPE and corresponded to the intensity of the molecular motion in the amorphous region (b relaxation) of each PE material. Consequently, it was deduced that only PM-5 is compatible with PE and has the ability to migrate through the amorphous regions of PE materials, thus enabling this PSi to affect PE heat-fusion properties. V C 2012 Wiley Periodicals, Inc. J Appl Polym Sci 126: E188-E194, 2012

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Electroreductive synthesis of some functionalized polysilanes and related polymers

Cited by 34 publications

References 25 publications

Electrochemical synthesis of dialkylsubstituted polystannanes and their properties

Electrochemical synthesis of dialkylsubstituted polystannanes and their properties

The Effect of Interfacial Polysilane Coating on Heat Fusion Properties of Polypropylene

The effect of adding polysilane on heat fusion properties of various kinds of polyethylene

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